For chemists, formulators, and procurement specialists, a deep understanding of a chemical compound's properties and origins is essential for successful application and sourcing. 6-Hexanolactone, known scientifically as ε-Caprolactone or CAS 502-44-3, is a molecule of significant industrial interest. This article will explore its key chemical characteristics, common synthesis methods, and provide guidance on where to effectively buy this important chemical intermediate.

Chemical Profile of 6-Hexanolactone
6-Hexanolactone is a colorless oily liquid with a molecular formula of C6H10O2 and a molar mass of approximately 114.14 g/mol. Its chemical structure features a seven-membered ring containing an ester functional group, classifying it as a lactone. This cyclic ester is miscible with most organic solvents, including alcohols, ethers, and ketones, but shows limited solubility in water at room temperature, though it is generally considered soluble. The compound has a boiling point of around 241 °C and a melting point of -1 °C. Its purity is typically specified at ≥ 99.0%, with water content ideally below 0.05%, ensuring its suitability for sensitive polymerization processes.

Industrial Synthesis Pathways
The industrial production of 6-Hexanolactone primarily involves the Baeyer-Villiger oxidation of cyclohexanone. In this process, cyclohexanone is reacted with a peroxy acid, such as peracetic acid, which inserts an oxygen atom into the ring adjacent to the carbonyl group, forming the lactone. This method is widely adopted by manufacturers due to its efficiency and scalability. The resulting crude product undergoes vacuum distillation to achieve the required purity. Understanding these synthesis routes can help buyers appreciate the factors influencing product quality and price.

Key Applications Driven by its Properties
The chemical properties of 6-Hexanolactone make it a versatile building block. Its primary use is as a monomer in the production of polycaprolactone (PCL), a biodegradable polyester with applications ranging from medical devices to environmentally friendly packaging. It also serves as a crucial intermediate for synthesizing caprolactam and adipic acid, vital components for the polymer industry. Furthermore, its solvent properties are leveraged in the formulation of adhesives, coatings, and as a diluent. When sourcing for these applications, it is important to consult with suppliers regarding the specific grade and packaging (commonly 200kg drums) that best suits your needs.

Sourcing Considerations for Buyers
When procuring 6-Hexanolactone, buyers should focus on reputable suppliers and manufacturers who can provide detailed specifications, Certificates of Analysis (CoA), and ensure consistent batch quality. Comparing quotes from different vendors is a standard practice to achieve competitive pricing. Always request samples for verification purposes before committing to a bulk order. Factors such as delivery lead times, packaging integrity, and the supplier's technical support should also be carefully evaluated.

By understanding the chemical nature, synthesis, and applications of 6-Hexanolactone, professionals can make informed decisions when sourcing this critical compound. Partnering with trusted chemical providers ensures access to high-quality materials essential for innovation and production.